EP0142927A3 - Optical disc - Google Patents

Optical disc Download PDF

Info

Publication number: EP0142927A3
Authority: EP; European Patent Office
Prior art keywords: optical disc; disc; optical
Prior art date: 1983-11-24
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP84306710A

Other versions

EP0142927A2 (en

Inventor

Neil Keith Balston

Keith Douglas Anderson

Herman William Willemsen

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nortel Networks Ltd

Original Assignee

Northern Telecom Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1983-11-24

Filing date

1984-10-02

Publication date

1985-07-24

1984-10-02 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1985-05-29 Publication of EP0142927A2 publication Critical patent/EP0142927A2/en

1985-07-24 Publication of EP0142927A3 publication Critical patent/EP0142927A3/en

Status Withdrawn legal-status Critical Current

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
- G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers

EP84306710A 1983-11-24 1984-10-02 Optical disc Withdrawn EP0142927A3 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
CA441896		1983-11-24
CA000441896A CA1198209A (en)	1983-11-24	1983-11-24	Optical disc

Publications (2)

Publication Number	Publication Date
EP0142927A2 EP0142927A2 (en)	1985-05-29
EP0142927A3 true EP0142927A3 (en)	1985-07-24

Family

ID=4126593

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP84306710A Withdrawn EP0142927A3 (en)	1983-11-24	1984-10-02	Optical disc

Country Status (4)

Country	Link
EP (1)	EP0142927A3 (en)
JP (1)	JPS60131655A (en)
KR (1)	KR850004148A (en)
CA (1)	CA1198209A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0166614A3 (en) *	1984-06-29	1987-12-23	Minnesota Mining And Manufacturing Company	Encoated optical recording medium
GB8624444D0 (en) *	1986-10-11	1986-11-12	London Weekend Television Ltd	Optical disc

Citations (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2217761A1 (en) *	1973-02-09	1974-09-06	Philips Nv
FR2385170A1 (en) *	1977-03-24	1978-10-20	Laser File	PROCESS AND APPARATUS FOR RECORDING INFORMATION
FR2420811A1 (en) *	1978-03-22	1979-10-19	Philips Nv	MULTI-LAYER INFORMATION DISC
GB2084786A (en) *	1980-09-25	1982-04-15	Rca Corp	Variable sensitivity optical recording medium and information record
GB2086638A (en) *	1980-10-21	1982-05-12	Rca Corp	Optical recording medium and record
EP0051429A1 (en) *	1980-10-28	1982-05-12	Kabushiki Kaisha Toshiba	Optical memory device and system
EP0054438A1 (en) *	1980-12-17	1982-06-23	Matsushita Electric Industrial Co., Ltd.	Optical disk having an index mark
FR2505075A1 (en) *	1981-05-01	1982-11-05	Drexler Tech	OPTICAL MEDIUM REFLECTING LASER RECORDED DATA, AND METHOD OF MAKING SAME
EP0064897A1 (en) *	1981-04-27	1982-11-17	Thomson-Csf	Information carrier disc with angular coding and rotation drive system for such a disc
DE3139543A1 (en) *	1981-10-05	1983-04-21	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	System for automatically controlling a record player
GB2121227A (en) *	1982-05-11	1983-12-14	Nigel Geoffrey Ley	Optical memory recording disc

1983
- 1983-11-24 CA CA000441896A patent/CA1198209A/en not_active Expired
1984
- 1984-10-02 EP EP84306710A patent/EP0142927A3/en not_active Withdrawn
- 1984-11-22 KR KR1019840007329A patent/KR850004148A/en not_active Application Discontinuation
- 1984-11-24 JP JP59247049A patent/JPS60131655A/en active Pending

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2217761A1 (en) *	1973-02-09	1974-09-06	Philips Nv
FR2385170A1 (en) *	1977-03-24	1978-10-20	Laser File	PROCESS AND APPARATUS FOR RECORDING INFORMATION
FR2420811A1 (en) *	1978-03-22	1979-10-19	Philips Nv	MULTI-LAYER INFORMATION DISC
GB2084786A (en) *	1980-09-25	1982-04-15	Rca Corp	Variable sensitivity optical recording medium and information record
GB2086638A (en) *	1980-10-21	1982-05-12	Rca Corp	Optical recording medium and record
EP0051429A1 (en) *	1980-10-28	1982-05-12	Kabushiki Kaisha Toshiba	Optical memory device and system
EP0054438A1 (en) *	1980-12-17	1982-06-23	Matsushita Electric Industrial Co., Ltd.	Optical disk having an index mark
EP0064897A1 (en) *	1981-04-27	1982-11-17	Thomson-Csf	Information carrier disc with angular coding and rotation drive system for such a disc
FR2505075A1 (en) *	1981-05-01	1982-11-05	Drexler Tech	OPTICAL MEDIUM REFLECTING LASER RECORDED DATA, AND METHOD OF MAKING SAME
DE3139543A1 (en) *	1981-10-05	1983-04-21	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	System for automatically controlling a record player
GB2121227A (en) *	1982-05-11	1983-12-14	Nigel Geoffrey Ley	Optical memory recording disc

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 22, no. 3, August 1979, page 1183, New York, US; C.A. BRUCE et al.: "Video disk with updating feature" *

Also Published As

Publication number	Publication date
KR850004148A (en)	1985-07-01
JPS60131655A (en)	1985-07-13
EP0142927A2 (en)	1985-05-29
CA1198209A (en)	1985-12-17

Publication	Publication Date	Title
DE3569054D1 (en)	1989-04-27	Optical disk
EP0100995A3 (en)	1985-10-16	Optical disk
DE3476483D1 (en)	1989-03-02	Optical memory disc
DE3377034D1 (en)	1988-07-14	Optical disk
GB2104412B (en)	1985-01-30	Optical disc
GB2153298B (en)	1986-04-23	Optical disc
EP0178836A3 (en)	1988-01-07	Optical disc
AU1087183A (en)	1983-08-11	Optical disc
GB2135475B (en)	1986-03-19	Optical de-polarizer
GB2159299B (en)	1987-09-30	Optical discs
GB8411509D0 (en)	1984-06-13	Optical disc
EP0116467A3 (en)	1987-06-24	Optical disc players
DE3476482D1 (en)	1989-03-02	Optical memory disc
DE3468287D1 (en)	1988-02-04	Optical disc player
DE3380426D1 (en)	1989-09-21	Optical disc reproducer
DE3471790D1 (en)	1988-07-07	Optical disc players
DE3462293D1 (en)	1987-03-05	Optically readable disc
DE3469389D1 (en)	1988-03-24	Optical recording element
EP0147993A3 (en)	1987-08-05	Disk unit
EP0239130A3 (en)	1989-02-08	Optical disc
GB8624444D0 (en)	1986-11-12	Optical disc
DE3365006D1 (en)	1986-09-04	Optical recording disc
AU91189S (en)	1985-11-07	An optical disk
DE3475114D1 (en)	1988-12-15	Optical assemblies
EP0142927A3 (en)	1985-07-24	Optical disc

Legal Events

Date	Code	Title	Description
1985-03-30	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1985-05-21	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1985-05-29	AK	Designated contracting states	Designated state(s): DE FR GB IT NL
1985-07-24	AK	Designated contracting states	Designated state(s): DE FR GB IT NL
1985-12-18	17P	Request for examination filed	Effective date: 19851003
1987-05-06	17Q	First examination report despatched	Effective date: 19870323
1988-01-13	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1988-03-02	18D	Application deemed to be withdrawn	Effective date: 19870804
2007-08-08	RIN1	Information on inventor provided before grant (corrected)	Inventor name: ANDERSON, KEITH DOUGLAS Inventor name: BALSTON, NEIL KEITH Inventor name: WILLEMSEN, HERMAN WILLIAM